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- W2242719491 abstract "Structural and electronic characterization of (Ca0.67Sr0.33)Fe2As2 has been performed as a func- tion of pressure up to 12 GPa using conventional and designer diamond anvil cells. The compound (Ca0.67Sr0.33)Fe2As2 behaves intermediate between its end members-CaFe2As2 and SrFe2As2- displaying a suppression of magnetism and the onset of superconductivity. Like other members of the AEFe2As2 family, (Ca0.67Sr0.33)Fe2As2 undergoes a pressure-induced isostructural volume collapse, which we associate with the development of As-As bonding across the mirror plane of the structure. This collapsed tetragonal phase abruptly cuts off the magnetic state, giving rise to superconductivity with a maximum Tc=22.2 K. The maximum Tc of the superconducting phase is not strongly correlated with any structural parameter, but its proximity to the abrupt suppression of magnetism as well as the volume collapse transition suggests that magnetic interactions and structural inhomogeneity may play a role in its development. The pressure-dependent evolution of the ordered states and crystal structures in (Ca,Sr)Fe2As2 provides an avenue to understand the generic behavior of the other members of the AEFe2As2 family." @default.
- W2242719491 created "2016-06-24" @default.
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- W2242719491 date "2012-05-02" @default.
- W2242719491 modified "2023-10-13" @default.
- W2242719491 title "Suppression of magnetism and development of superconductivity within the collapsed tetragonal phase of<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mi mathvariant=bold>Ca</mml:mi><mml:mrow><mml:mn mathvariant=bold>0</mml:mn><mml:mo>.</mml:mo><mml:mn mathvariant=bold>67</mml:mn></mml:mrow></mml:msub><mml:msub><mml:mi mathvariant=bold>Sr</mml:mi><mml:mrow><mml:mn mathvariant=bold>0</mml:mn><mml:mo>.</mml:mo><mml:mn mathvariant=bold>…" @default.
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- W2242719491 doi "https://doi.org/10.1103/physrevb.85.184501" @default.
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